Becky, chelation originated I think in the 1920 or 1930s to treat really large doses of contamination in industrial workers. Who were very symptomatic to put it mildly. The validity of chelation therapy for these purposes is not disputed. The agent if I am not mistaken is injected into the bloodstream where it binds the metal. Does it apply to removing metals from the fat tissue tho?
"Detox" originated earlier as a way of cleansing the body from the - I believe we would all agree on that - mythical self-contamination arising out of day-to-day life . The concept was then medical. A similarly preposterous idea is that by eating foods in wrong combination the body produces toxins, which later have to be removed by colonics etc, or the diet changed to a strained and unnatural (meaning unlike what we see in peasants' eating patterns from the world over) regimen of "food combining". So I guess if we change the term from the detox with its bad reputation to sth else, we might all agree more.
On the subject of breast cancer, it seems to me that the vast decrease in incidence due to long-haul breastfeeding points to a hormonal reason more than to anything else. I agree tho that breast cancer is actually different types of cancer and many factors are involved.
With chemotherapy, short fasting might make sense since it increases appetite (I guess like THC but without any substance intake involved), and that's so very important. As for fasting after some kind of strange food experience, that goes against the grain (literally speaking) for me. It also reminds me of old (again, nothing forward looking here, just old, old practices - and I've seen so many people cleanse, fast, drink their own urine, drink their boiled-down urine, self-clean their GI tract, do all of this and take herbs in addition, take homeopathics in addition, eat one food one day, another food another day, - oh I can't even list all the things people did, it was so popular) premises regarding limiting the physical self. Sort of indulgence - pay for it by balancing with restraint type of thinking. This certainly has not been proven right - think sex frequency here, no health benefits from limiting, despite what the old medical profession believed. So when fasting is recommended, I would question what the underlying thinking is. If the "pay for sth" is lurking even remotely behind, a red flag - again, for me.